opendaylight/netconf/netconf-mapping-api/src/main/java/org/opendaylight/controller/netconf/mapping/api/HandlingPriority.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.netconf.mapping.api;
  10
  11 import com.google.common.base.Optional;
  12
  13 public class HandlingPriority implements Comparable<HandlingPriority> {
  14
  15     public static final HandlingPriority CANNOT_HANDLE = new HandlingPriority();
  16     public static final HandlingPriority HANDLE_WITH_DEFAULT_PRIORITY = new HandlingPriority(Integer.MIN_VALUE);
  17     public static final HandlingPriority HANDLE_WITH_MAX_PRIORITY = new HandlingPriority(Integer.MAX_VALUE);
  18
  19     private Integer priority;
  20
  21     public static HandlingPriority getHandlingPriority(int priority) {
  22         return new HandlingPriority(priority);
  23     }
  24
  25     private HandlingPriority(int priority) {
  26         this.priority = priority;
  27     }
  28
  29     private HandlingPriority() {
  30     }
  31
  32     /**
  33      * @return priority number or Optional.absent otherwise
  34      */
  35     public Optional<Integer> getPriority() {
  36         return Optional.of(priority).or(Optional.<Integer> absent());
  37     }
  38
  39     // TODO test
  40
  41     @Override
  42     public int compareTo(HandlingPriority o) {
  43         if (this == o)
  44             return 0;
  45         if (this == CANNOT_HANDLE)
  46             return -1;
  47         if (o == CANNOT_HANDLE)
  48             return 1;
  49
  50         if (priority > o.priority)
  51             return 1;
  52         if (priority == o.priority)
  53             return 0;
  54         if (priority < o.priority)
  55             return -1;
  56
  57         throw new IllegalStateException("Unexpected state");
  58     }
  59
  60     @Override
  61     public boolean equals(Object o) {
  62         if (this == o)
  63             return true;
  64         if (!(o instanceof HandlingPriority))
  65             return false;
  66
  67         HandlingPriority that = (HandlingPriority) o;
  68
  69         if (priority != null ? !priority.equals(that.priority) : that.priority != null)
  70             return false;
  71
  72         return true;
  73     }
  74
  75     @Override
  76     public int hashCode() {
  77         return priority != null ? priority.hashCode() : 0;
  78     }
  79 }